Firth told BuzzFeed that she felt it was "disrespectful" to blame the Ukraine for the disaster.

“When this story broke I ran back into the newsroom and saw how we were covering it already and I just knew I had to go,” Firth said.

“When this story broke I ran back into the newsroom and saw how we were covering it already and I just knew I had to go,” Firth said. “It was the total disregard to the facts."

Flight 17 was shot down over eastern Ukraine on Thursday with 298 people on board. Ukraine’s Security Service Chief Valentyn Nalyvaichenko was quick to point to finger at Russia, saying he had “unconditional evidence” that Russia was involved in downing the plane. He blamed pro-Russian rebels for the attack. Russia, in turn, blamed Kiev for not pulling back its operation in the region.

Firth is the second RT journalist to resign this year. In March, shortly following Russia's military action in Ukraine, American RT Anchor Liz Wahl dramatically resigned on air, stating she could not be "part of a network that whitewashes the actions of [Russian President Vladimir] Putin."

Another RT anchor, Abby Martin, also spoke out against the military action on the air the day before. Martin, however, is still with the network.

The latest resignation came after Firth got into a discussion on Twitter with another RT correspondent, London-based Polly Boiko about whether the two ultimately work for Putin:

@Polly_Boiko@ukTanos Lies hun. We do work for Putin. We are asked on a daily basis if not to totally ignore then to obscure the truth